From: "Kirill A. Shutemov" Subject: [PATCHv5 36/36] ext4, vfs: add huge= mount option Date: Tue, 29 Nov 2016 14:23:04 +0300 Message-ID: <20161129112304.90056-37-kirill.shutemov@linux.intel.com> References: <20161129112304.90056-1-kirill.shutemov@linux.intel.com> Cc: Alexander Viro , Hugh Dickins , Andrea Arcangeli , Dave Hansen , Vlastimil Babka , Matthew Wilcox , Ross Zwisler , linux-ext4@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-block@vger.kernel.org, "Kirill A. Shutemov" To: "Theodore Ts'o" , Andreas Dilger , Jan Kara , Andrew Morton Return-path: In-Reply-To: <20161129112304.90056-1-kirill.shutemov@linux.intel.com> Sender: owner-linux-mm@kvack.org List-Id: linux-ext4.vger.kernel.org The same four values as in tmpfs case. Encyption code is not yet ready to handle huge page, so we disable huge pages support if the inode has EXT4_INODE_ENCRYPT. Signed-off-by: Kirill A. Shutemov --- fs/ext4/ext4.h | 5 +++++ fs/ext4/inode.c | 30 +++++++++++++++++++++++------- fs/ext4/super.c | 24 ++++++++++++++++++++++++ 3 files changed, 52 insertions(+), 7 deletions(-) diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h index aff204f040fc..fb3f81863b53 100644 --- a/fs/ext4/ext4.h +++ b/fs/ext4/ext4.h @@ -1133,6 +1133,11 @@ struct ext4_inode_info { #define EXT4_MOUNT_DIOREAD_NOLOCK 0x400000 /* Enable support for dio read nolocking */ #define EXT4_MOUNT_JOURNAL_CHECKSUM 0x800000 /* Journal checksums */ #define EXT4_MOUNT_JOURNAL_ASYNC_COMMIT 0x1000000 /* Journal Async Commit */ +#define EXT4_MOUNT_HUGE_MODE 0x6000000 /* Huge support mode: */ +#define EXT4_MOUNT_HUGE_NEVER 0x0000000 +#define EXT4_MOUNT_HUGE_ALWAYS 0x2000000 +#define EXT4_MOUNT_HUGE_WITHIN_SIZE 0x4000000 +#define EXT4_MOUNT_HUGE_ADVISE 0x6000000 #define EXT4_MOUNT_DELALLOC 0x8000000 /* Delalloc support */ #define EXT4_MOUNT_DATA_ERR_ABORT 0x10000000 /* Abort on file data write */ #define EXT4_MOUNT_BLOCK_VALIDITY 0x20000000 /* Block validity checking */ diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c index 17a767c21dc3..4c37fd9fb219 100644 --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -4472,7 +4472,7 @@ int ext4_get_inode_loc(struct inode *inode, struct ext4_iloc *iloc) void ext4_set_inode_flags(struct inode *inode) { unsigned int flags = EXT4_I(inode)->i_flags; - unsigned int new_fl = 0; + unsigned int mask, new_fl = 0; if (flags & EXT4_SYNC_FL) new_fl |= S_SYNC; @@ -4484,12 +4484,28 @@ void ext4_set_inode_flags(struct inode *inode) new_fl |= S_NOATIME; if (flags & EXT4_DIRSYNC_FL) new_fl |= S_DIRSYNC; - if (test_opt(inode->i_sb, DAX) && S_ISREG(inode->i_mode) && - !ext4_should_journal_data(inode) && !ext4_has_inline_data(inode) && - !ext4_encrypted_inode(inode)) - new_fl |= S_DAX; - inode_set_flags(inode, new_fl, - S_SYNC|S_APPEND|S_IMMUTABLE|S_NOATIME|S_DIRSYNC|S_DAX); + if (S_ISREG(inode->i_mode) && !ext4_encrypted_inode(inode)) { + if (test_opt(inode->i_sb, DAX) && + !ext4_should_journal_data(inode) && + !ext4_has_inline_data(inode)) + new_fl |= S_DAX; + switch (test_opt(inode->i_sb, HUGE_MODE)) { + case EXT4_MOUNT_HUGE_NEVER: + break; + case EXT4_MOUNT_HUGE_ALWAYS: + new_fl |= S_HUGE_ALWAYS; + break; + case EXT4_MOUNT_HUGE_WITHIN_SIZE: + new_fl |= S_HUGE_WITHIN_SIZE; + break; + case EXT4_MOUNT_HUGE_ADVISE: + new_fl |= S_HUGE_ADVISE; + break; + } + } + mask = S_SYNC | S_APPEND | S_IMMUTABLE | S_NOATIME | + S_DIRSYNC | S_DAX | S_HUGE_MODE; + inode_set_flags(inode, new_fl, mask); } /* Propagate flags from i_flags to EXT4_I(inode)->i_flags */ diff --git a/fs/ext4/super.c b/fs/ext4/super.c index 72b459d2b244..127ddfeae1e0 100644 --- a/fs/ext4/super.c +++ b/fs/ext4/super.c @@ -1296,6 +1296,7 @@ enum { Opt_dioread_nolock, Opt_dioread_lock, Opt_discard, Opt_nodiscard, Opt_init_itable, Opt_noinit_itable, Opt_max_dir_size_kb, Opt_nojournal_checksum, + Opt_huge_never, Opt_huge_always, Opt_huge_within_size, Opt_huge_advise, }; static const match_table_t tokens = { @@ -1376,6 +1377,10 @@ static const match_table_t tokens = { {Opt_init_itable, "init_itable"}, {Opt_noinit_itable, "noinit_itable"}, {Opt_max_dir_size_kb, "max_dir_size_kb=%u"}, + {Opt_huge_never, "huge=never"}, + {Opt_huge_always, "huge=always"}, + {Opt_huge_within_size, "huge=within_size"}, + {Opt_huge_advise, "huge=advise"}, {Opt_test_dummy_encryption, "test_dummy_encryption"}, {Opt_removed, "check=none"}, /* mount option from ext2/3 */ {Opt_removed, "nocheck"}, /* mount option from ext2/3 */ @@ -1494,6 +1499,11 @@ static int clear_qf_name(struct super_block *sb, int qtype) #define MOPT_NO_EXT3 0x0200 #define MOPT_EXT4_ONLY (MOPT_NO_EXT2 | MOPT_NO_EXT3) #define MOPT_STRING 0x0400 +#ifdef CONFIG_TRANSPARENT_HUGE_PAGECACHE +#define MOPT_HUGE 0x1000 +#else +#define MOPT_HUGE MOPT_NOSUPPORT +#endif static const struct mount_opts { int token; @@ -1581,6 +1591,10 @@ static const struct mount_opts { {Opt_jqfmt_vfsv0, QFMT_VFS_V0, MOPT_QFMT}, {Opt_jqfmt_vfsv1, QFMT_VFS_V1, MOPT_QFMT}, {Opt_max_dir_size_kb, 0, MOPT_GTE0}, + {Opt_huge_never, EXT4_MOUNT_HUGE_NEVER, MOPT_HUGE}, + {Opt_huge_always, EXT4_MOUNT_HUGE_ALWAYS, MOPT_HUGE}, + {Opt_huge_within_size, EXT4_MOUNT_HUGE_WITHIN_SIZE, MOPT_HUGE}, + {Opt_huge_advise, EXT4_MOUNT_HUGE_ADVISE, MOPT_HUGE}, {Opt_test_dummy_encryption, 0, MOPT_GTE0}, {Opt_err, 0, 0} }; @@ -1662,6 +1676,16 @@ static int handle_mount_opt(struct super_block *sb, char *opt, int token, } else return -1; } + if (MOPT_HUGE != MOPT_NOSUPPORT && m->flags & MOPT_HUGE) { + sbi->s_mount_opt &= ~EXT4_MOUNT_HUGE_MODE; + sbi->s_mount_opt |= m->mount_opt; + if (m->mount_opt) { + ext4_msg(sb, KERN_WARNING, "Warning: " + "Support of huge pages is EXPERIMENTAL," + " use at your own risk"); + } + return 1; + } if (m->flags & MOPT_CLEAR_ERR) clear_opt(sb, ERRORS_MASK); if (token == Opt_noquota && sb_any_quota_loaded(sb)) { -- 2.10.2 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. 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